2014 Volume 122 Issue 1427 Pages 552-555
Mechanical properties such as elastic modulus of solid electrolytes are important for all-solid-state batteries. To investigate the effects of a partial substitution of oxide for sulfide on Young’s modulus, 70Li2S·(30 − x)P2S5·xP2O5 (mol %) (x = 0, 3 and 10) oxysulfide glasses were prepared and characterized. Young’s moduli were measured by ultrasonic pulse echo method for the dense pellets prepared by hot pressing at around glass transition temperature. The Young’s moduli of 70Li2S·(30 − x)P2S5·xP2O5 glasses were 22–27 GPa and increased with an increase in the P2O5 content. The highest Young’s modulus in this report was 27 GPa for the glass with 10 mol % P2O5.